A 21 February, 2017 file photo showing a general view of Yuganskneftegaz pumping station in Priobskoe, 200km from Nefteyugansk in Russia. CEFC in September 2017 became the third-largest shareholder in Russia’s Rosneft, the world’s largest listed oil producer. Photo: EPA/YURI KOCHETKOV

A 21 February, 2017 file photo showing a general view of Yuganskneftegaz pumping station in Priobskoe, 200km from Nefteyugansk in Russia. CEFC in September 2017 became the third-largest shareholder in Russia’s Rosneft, the world’s largest listed oil producer. Photo: EPA/YURI KOCHETKOV